package com.eazy.lksy.netty;

import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import io.netty.util.concurrent.GlobalEventExecutor;

public class TextWebSocketFrameHandler extends
        SimpleChannelInboundHandler<TextWebSocketFrame> {

    public static ChannelGroup channels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);

    @Override
    protected void channelRead0(ChannelHandlerContext ctx,
            TextWebSocketFrame msg) throws Exception { // (1)
        Channel incoming = ctx.channel();
        for (Channel channel : channels) {
        if (channel != incoming){
        channel.writeAndFlush(new TextWebSocketFrame("[" + incoming.remoteAddress() + "]" + msg.text()));
        } else {
        channel.writeAndFlush(new TextWebSocketFrame("[you]" + msg.text() ));
        }
    }
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {  // (2)
        Channel incoming = ctx.channel();

        // Broadcast a message to multiple Channels
        channels.writeAndFlush(new TextWebSocketFrame("[SERVER] - " + incoming.remoteAddress() + " 加入"));

        channels.add(incoming);
            System.out.println("Client:"+incoming.remoteAddress() +"加入");
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {  // (3)
        Channel incoming = ctx.channel();

        // Broadcast a message to multiple Channels
        channels.writeAndFlush(new TextWebSocketFrame("[SERVER] - " + incoming.remoteAddress() + " 离开"));

            System.out.println("Client:"+incoming.remoteAddress() +"离开");

        // A closed Channel is automatically removed from ChannelGroup,
        // so there is no need to do "channels.remove(ctx.channel());"
        }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception { // (5)
        Channel incoming = ctx.channel();
        System.out.println("Client:"+incoming.remoteAddress()+"在线");
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception { // (6)
        Channel incoming = ctx.channel();
        System.out.println("Client:"+incoming.remoteAddress()+"掉线");
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
            throws Exception {
        Channel incoming = ctx.channel();
        System.out.println("Client:"+incoming.remoteAddress()+"异常");
        // 当出现异常就关闭连接
        cause.printStackTrace();
        ctx.close();
    }

}